Francesco Mazzilli

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—It is desirable in active medical implants to derive energy from external sources to charge a rechargeable battery. In this paper we have developed a novel system to transfer energy via ultrasound to a deep implanted medical device. Hence, an external base station is designed to transmitt energy and a 64-channel high-voltage driver is proposed for a(More)
Rectifiers are important energy converters and henceforth crucial building blocks for RFID applications. In the first half of the work, we have presented a design methodology for matching the rectifier input impedance with the antenna to maximize the rectifier power conversion efficiency. The proposed design approach uses the fundamental transconductance(More)
A platform to study ultrasound as a source for wireless energy transfer and communication for implanted medical devices is described. A tank is used as a container for a pair of electroacoustic transducers, where a control unit is fixed to one wall of the tank and a transponder can be manually moved in three axes and rotate using a mechanical system. The(More)
The 2010 WHO Laboratory Manual for the Examination and Processing of Human Semen has established a new classification of sperm motility, as follows: a) progressive motility, which includes both forward progression (rapid and slow) and sluggish motility; b) non progressive motility. Unfortunately, this new classification is insufficient to allow for detailed(More)
— The design methodology of a miniaturized tag antenna and an integrated rectifier for remote powering of wireless sensor systems operating at 2.45 GHz ISM band is presented. To maximize the power transfer the antenna input impedance is matched to the conjugate of the rectifier impedance. The overall efficiency of the rectenna is evaluated through the(More)
A new odd-order frequency multiplier topology is demonstrated in this work that uses a subharmonic mixer to realize a frequency tripler. A feedforward circuit is used for fundamental cancellation at the output and eliminates the need for filtering structures. For demonstrative purposes, and to validate the concept, a 1-3-GHz proof-of-concept frequency(More)
A study on ultrasound link for wireless energy transmission dedicated to deeply implanted medical devices is presented. The selection of the frequency to avoid biological side effects (e.g., cavitations), the choice of the power amplifier to drive the external transducers and the design of the rectifier to maximize the energy extraction from the implanted(More)
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